A potentiometer wire carries a steady current. The potential diff. across 70cm length of it balances the potential diff. across a 2 ohm coil supplied by a cell of emf 2V and unknown int. resistance r, When 1 ohm resistance is placed in parallel with a 2 ohm, a length equal to 50 cm of the potentiometer wire is required to balance the potential diff. across the parallel combination. Find r.

Asked by  | 23rd Sep, 2011, 01:44: PM

Expert Answer:

Answered by  | 4th Oct, 2011, 10:14: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.